CAJ | 학술논문

根据1998年7月在南海东北部柘林湾的调查数据，探讨网箱养殖海域溶解氧的分布及其与其他环境因子间的关系。结果显示夏季海水溶解氧浓度为3.08～7.86mg/L（平均5.30），其分布为网箱区（平均4.44）低于对照区（平均6.12），表层（平均5.69）高于底层（平均4.67），退潮时（平均5.71）高于涨潮时（平均4.65），涨潮时网箱区内贫氧（＜4mg/L）。多元逐步回归分析表明，对溶解氧浓度有重要影响的水质因子为pH和水温，其次为盐度、COD和营养盐，它们的变化与DO的变化有较好的相关性。区域比较表明，海水溶解氧浓度与观测位置到网箱区的距离呈正相关（P＜0.02），与底质硫化物、PO4-P含量呈负相关（P＜0.05）。溶解氧浓度偏低与养殖环境的污染有直接关系。
근거1998년7월재남해동북부자림만적조사수거，탐토망상양식해역용해양적분포급기여기타배경인자간적관계。결과현시하계해수용해양농도위3.08～7.86mg/L（평균5.30），기분포위망상구（평균4.44）저우대조구（평균6.12），표층（평균5.69）고우저층（평균4.67），퇴조시（평균5.71）고우창조시（평균4.65），창조시망상구내빈양（＜4mg/L）。다원축보회귀분석표명，대용해양농도유중요영향적수질인자위pH화수온，기차위염도、COD화영양염，타문적변화여DO적변화유교호적상관성。구역비교표명，해수용해양농도여관측위치도망상구적거리정정상관（P＜0.02），여저질류화물、PO4-P함량정부상관（P＜0.05）。용해양농도편저여양식배경적오염유직접관계。
Based on investigation data in July, 1998,this pa per deals withva riations of dissolved oxygen (DO) in the waters of cage culture area of Zhelin Bay,and the relationships between DO and other environmental factors. It was observed that DO concentrations were 3.08～7.86mg/L (average of 5.30), DO conc entrations(average of 4.44) in culture area,(average of 4.65) in high tide an d (average of 4.67)at bottom,were lower than those(average of 6.12) in control area,(average of 5.71)in low tide and when tide set at the surface (average of 5.69). Multiple reg ression shows that pH and temperature are the important factors affecting the va riations of DO (followed by salinity, COD, and nutrient salts) and that they have significant correlation with DO. Preliminary results indicate that DO conce ntration is positively related to distance from culture area (P＜0.02), but negatively correlated to sulfide content and PO4-P content ( P＜0.05) of surface sediments.